Respuesta :
No. It should be:
-Mi hermano irá a la escuela mañana
OR
-Mi hermano va a ir a le escuela mañana
Answer:
Yes, your sentence is gramatically CORRECT because the translation of the sentence is "my brother will go to school tomorrow". Not only this but this could also work: "Mi hermano podría ir a la escuela mañana." Which means "my brother could go to school tomorrow"
Explanation: